/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMTemplate.h
Returns the prefix for an argument in the notation
static const [FString](API\Runtime\Core\Containers\FString) & GetArgumentNotationPrefix ( const [FRigVMTemplateArgument](API\Plugins\RigVM\RigVMCore\FRigVMTemplateArgument) & InArgument )